Yeah, it looks like a short section of “Roller Chain”, though the design is unusual. I’m thinking it’s needed for some kind of constant pressure, like under a conveyor belt or something similar. Of course, I’ve been wrong before. :)

I certainly don’t recognize it, though I highly doubt it’s part of a chain because there is no way to attach more links. The rings are arranged in such a way that if the device were rolled along a surface, there would be 11 evenly spaced tracks. If it were 12, I would have though something to do with punch cards…maybe to roll along a freshly punched card to pop out any hanging chads. However, the rollers could still go *between* the punched holes and help pop the chads out somehow.

When I was younger my granddad gave me a box of ‘things’ from his garage and there was one of these things in there. I wish I could remember what it was because he did tell me at the time…… dangit, I knew I should have paid more attention as a kid.

I don’t think that’s part of a longer chain. Just look at the axis of the end-segments. No place to add an additional segment. They are just too short to hold an additional set of links.

And look for the ‘strange’ alignment and the design of the segments. Not like a normal chain would look like. This is designed to come in three segments. There are two different segment types. Nothing I assume to see on a normal chain.